Hi Andreas!
Thanks for reaching out to us. Let me try to help you with this topic.
When you create a ticket for an event it gets linked to it, so you can always relate a ticket to a specific event.
I think it will depend on which specific data you need to gather from the users. Let me point you to our Event Tickets user primer > https://theeventscalendar.com/knowledgebase/new-user-primer-event-tickets/ that will get you started on how to set up your tickets.
If you want to gather information about an event attendees, you can always export a list of attendees for a specific event > https://theeventscalendar.com/knowledgebase/managing-your-orders-and-attendees/#exporting-attendees that will allow you to get a CSV file with all the attendees which you can then use somewhere else.
If you sell your tickets using WooCommerce, you can also use the reports capabilities that WooCommerce has built in. Here’s some documentation about it > https://docs.woocommerce.com/document/reports/
I hope that helps as a starting point. Don’t hesitate to ask any follow up questions and I’d be happy to help.
Best,
Victor